Merge Hotfix/7.141.1 into 7.142.0 release branch (#3481)

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Task/Issue URL: https://app.asana.com/0/0/1208593312489483/f
Tech Design URL:
CC:

**Description**:
Merges the hot fix into the latest release branch

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**Steps to test this PR**:
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2.

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**Definition of Done (Internal Only)**:

* [ ] Does this PR satisfy our [Definition of
Done](https://app.asana.com/0/1202500774821704/1207634633537039/f)?

**Copy Testing**:

* [ ] Use of correct apostrophes in new copy, ie `’` rather than `'`

**Orientation Testing**:

* [ ] Portrait
* [ ] Landscape

**Device Testing**:

* [ ] iPhone SE (1st Gen)
* [ ] iPhone 8
* [ ] iPhone X
* [ ] iPhone 14 Pro
* [ ] iPad

**OS Testing**:

* [ ] iOS 15
* [ ] iOS 16
* [ ] iOS 17

**Theme Testing**:

* [ ] Light theme
* [ ] Dark theme

---
###### Internal references:
[Software Engineering
Expectations](https://app.asana.com/0/59792373528535/199064865822552)
[Technical Design
Template](https://app.asana.com/0/59792373528535/184709971311943)

---------

Co-authored-by: Michal Smaga <miasma13@gmail.com>
Co-authored-by: Sam Symons <sam@samsymons.com>

DuckDuckGo/TabViewController.swift

@@ -1325,6 +1325,7 @@ extension TabViewController: WKNavigationDelegate {
 
         let mimeType = MIMEType(from: navigationResponse.response.mimeType, fileExtension: navigationResponse.response.url?.pathExtension)
         let urlSchemeType = navigationResponse.response.url.map { SchemeHandler.schemeType(for: $0) } ?? .unknown
+        let urlNavigationalScheme = navigationResponse.response.url?.scheme.map { URL.NavigationalScheme(rawValue: $0) }
 
         let httpResponse = navigationResponse.response as? HTTPURLResponse
         let isSuccessfulResponse = httpResponse?.isSuccessfulResponse ?? false
@@ -1355,7 +1356,13 @@ extension TabViewController: WKNavigationDelegate {
                        withAdditionalParameters: [PixelParameters.canAutoPreviewMIMEType: "1"])
         } else if shouldTriggerDownloadAction(for: navigationResponse),
                   let downloadMetadata = AppDependencyProvider.shared.downloadManager.downloadMetaData(for: navigationResponse.response) {
-            // 3. We know the response should trigger the file download prompt
+            // 3a. We know it is a download, but allow WebKit handle the "data" scheme natively
+            if urlNavigationalScheme == .data {
+                decisionHandler(.download)
+                return
+            }
+
+            // 3b. We know the response should trigger the file download prompt
             self.presentSaveToDownloadsAlert(with: downloadMetadata) {
                 self.startDownload(with: navigationResponse, decisionHandler: decisionHandler)
             } cancelHandler: {